Paper-converting machinery



May 21, 1929. w. EGAN ET AL 1,714,261

PAPER CONVERTING MACHINERY Filed Nov. 11, 1927 2 Sheets-Sheet 1 INVENTOr m -w m BY ATTORNEYS.

May 21, 1929. F. w. EGAN ET AL 1 1,714,261

1 31mm CONVERTING MACHINERY Filed NOV. 11 1927 2 Sheets-Sheet 2 40 IN VEN TOR. M w. 6;, Wm 0m BYAQLLUAQLMMUWW ATTORNEYS.

Patented May 21, 1929.

UNITED STATES FRANCIS W. EGAN, OF \VOODCLIFF-ON-HUDSON, NEW JERSEY, ANDJOHN O. ROSS, OF

PATENT OFFICE.

NORTH TZLRRYTOWN, NEVT YORK, ASSIGNORS TO J. ROSS ENGINEERING COR-PORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

PAPER-CONVERTING MACHINERY.

Application filed November 11, 1927. Serial No. 232,583.

other is desirably madeof a more yielding material, being commonly madeof paper and designated as paper rolls. They may be made by heavilycompressing disks of paper and retaining them under heavy pressure,about a shaft, the outer surface being accurately turned to cylindricalform to cooperate with the surface of the metal roller.

in some operations, the paper roll and the steel roll move withdili'erent surface speeds, and a heating effect is produced by theresulting friction. In other cases, the steel roll is hollow and isinternally heated. For example, in embossing, the metal roller isconstructed of steel with the desired design engraved upon it in reverseso that the stock as it passes between the steel roll and the paper rollis squeezed down into the surface of the paper roll by the projectingdesign. With many fabrics it is necessary to heat the steel roll inorder to cause the design to remain upon the fabric.

In the n'ianufacture of special grades of paper such for example asglassine, the steel rollers are n t engraved. The effect is produced byheat and the pressure between the paper roll and the steel roll alone oraccompanied by a slipping between them.

Difliculty has been experienced in main- 1 taining the life of the paperrolls which have been found to disintegrate at the end portions muchfaster than at the center in spite of the fact that it is the centerportion which receives the most wear, as frequently the machine isused'with a stock or web of less width than the length of the paperrolls.

In accordance with this'invention, it .has been discovered that one ofthe important factors in disintegration is overheating and that thismore rapid disintegration at the ends of the paper rolls is due to thestill higher temperature at that place. At the points where the stockintervenes between the steel roll and the paper roll, it serves as aninsulator to retard the heating of the paper roll by the steel roll butat the ends of the rolls at the sides of the stock where the steel rolland the paper roll are in direct contact, the heating isrelatively-intensified.-

This protecting or cooling effect exerted by the strip is still moreprominent where the strip is fed to the rolls in damp condition sincethe evaporation of the contained moisture itself serves to assist thecooling.

It is an object of this invention to utilize this discovery to prolongthe life of the paper rolls and to this end, to equalize thetemperatures between the' exposed and unexposed portions of the paperroll so that the entire surface is maintained substantially at the sametemperature.

Since, moreover, the life of the paper rolls is thus found to be sointimately a function of the temperature at which they are maintained,it is a further object of this invention to increase the life of therolls by limiting their temperature throughout their entire width.

The invention accordingly comprisw the several steps andthe relation andorder of one or more of such steps with respect to each of the others,and the apparatus embodying features of construction, combinations'ofelements and arrangement of parts which are adapted to effect suchsteps, all as exemplified in the following detailed disclosure, and thescope of the application of which will be in-- dicated in the claims.

' For a fuller understanding of the nature and objects of the invention,reference should be had to the following detailed description taken inconnection with the accompanying drawings, in which:

Fig. 1 is a perspective view of a fourteen roll calendar stock machineembodying this invention in the manufacture of glassine paper.

Fig. 2 is a diagrammatic section of the device shown in Fig. 1.

Fig. 3 is a front elevation of a somewhat simplified apparatus embodyingthe invention, certain parts being broken away for clarity. t i i Fig. 4is a diagrammatic side elevation of the device shown in Fig. 3 with oneofthe supporting side frames removed. I,

Fig. 5 is a plan view of a means for limiting the temperature of theentire roll.

Fig. 6 is a detail showing an alternative method of equalizing thetemperature of the roll.

y We have illustrated the invention herein in connection with a machinefor the manufacture of glassine paper. From this illustra- ,tion, itsapplication to embossing or similar f work will be obvious. I

, In the drawings, the numeral 1 designates a pair of upright frames inwhich are journalled a plurality of steel rolls 2, 3, 4, 5, 6, and 7,and a plurality of paper rolls 12, 13, 14:, 15', 16 and 17. The order ofthese rolls may be varied to suit the nature of the work to'be done. Inthe form illustrate the steel and paper are alternated save tha thethirdpaper roll is superposed directly upon the second. It will beunderstood that as the paper stock S is wound back and forth between therolls, the finishing effect is accomplished chiefly by the steel rollsand where the rolls are alternated, one surface only is treated. Thedirect superposition of two rolls of like kind as herein illustratedcauses the treatment of both sides of the paper. A plurality of followerrolls 8 may be superposed upon the stack of treating rolls. if desired.

As illustrated, in Fig.- 2, the paper stock is carried in betweenthe-rolls 7 and 17, and" back between each pair in succession beingcarried around the semi-circumference of each rollin turn. Therolls'mayor may not be geared together ,as shown at 18 either formovement with a uniform surface velocity or to afford the slippagedesired.

These machines are frequently employed in the manufacture of a stock of.less width than the paper rolls leaving a portion at each end of thepaper rolls at each side of the stock in direct contactwith a steelroll. This results in a tendency to overheat this exposed I portion ofthe paper roll as has already been pointed out. In accordance with thisinvention, means are provided for equalizing the temperature betweenthis exposed portion and the central portion protected by the paper. p

In the practical embodiment illustrated, specific means are provided forcooling each end of the roll comprising an idlerroll 20 mounted on ashaft 21. This roll 20 is slid-- ably mounted upon the shaft 21 so thatit may be positioned to have its inner edge 23 coincide with the outeredge of the glassine strip and it is retained in such position bycollars 24 at each end of the idler roll. The idler roll 20 is inengagement with the surface of the paper roll and also with the surfaceof a moistening roll 27 journalled as at 28 within a trough 29 adaptedto contain water. Thus as the paper roll rotates, it picks up water fromthe surface of the idler roll 20 which has been carried to the roll 20by the roll 27. In this manner, there is deposited upon the paper roll adegree of moisture, the presence and evaporation of which is sufficientto maintain the temperature of the ends of the paper rolls substantiallyas low as that of the protected portions. The roll 27 may be coatedif-desired-with a water absorbent 30, and

the quantity of water deposited on the paper roll may be determined bythe character of the coating as well as by the pressure and the heightof'water in the trough.

In Fig. 3 is illustrated a machine of the same general nature'but withfewer rolls, the details being herein more clearly shown. In this view,the steel rolls are made hollow and supplied with steam to theirinterior through a conduit 35, so that if desired the machine may beoperated for certain purposes with hot rolls. This figure illustratesmore in detail the manner of supporting the moistening rolls, andthemoistening pans, the shafts 21 being shown is carried by brackets 22 at-.tached to the main frame 1. In this form of .device the stock S issupported byguide rolls 36 as it passes from one side of the machine 'tothe otherso that it does not pass around ported from the main frame.

Since it is the high temperature which causes disintegration of thepaperrolls, it is desirable also to employ means for lowering the temperatureof the entire roll. A practical form of accomplishing this result isto'providea conduit {10 supplied with air at a temperature materiallybelow that of the rolls, which is connected with a plurality ofhorizontal branch conduits 41, one such branch conduit being shownparallel and adjacent to each paper roll.

I Where the equalizing rollers 20 and the "branch conduits are both usedupon the same roll, they may, if desired, be located upon opposite sidesthereof for mechanical'convenience, and this is practical where/theauxiliary guide rolls 36 are employed. Each of the branch conduits isprovided with a plurality of nozzles 42 through which air is dischargedand distributed throughout the length of the roll. As illustrated theconduit 41 is within the bight of the paper formed between the oppositesides of the paper roll and one of the guide rolls 36,- and this is asatisfactory arrangement where the quantity of airemployed is not great.Under other circumstances it is preferable to provide the air blast uponthe side of the pa per which is opposite to the bight in order that theair discharged may have more free egress into the room. i

In the embodiment illustrated in Fig. 6, a different cooling means isemployed for equalizing the temperature' In thlS\QInb0dI-. ment, thereis provided a conduit 50 adjacent to and parallel to each of the paperrolls provided with jets 51 adapted to project fluid upon the surface ofthe roll, but means are provided to limit the number of these jetswhich. operate to limit the area of the roll which is affected thereby.This may pler form has beenchosen for this illustration in which each ofthe jets is individually controlled by a valve 52. The fluld distributedthrough'the conduit 50 may be either cold water to be atomized into aspray or cold air, to keep the rolls cool, but 1s preferably cold moistair. I prefer to add moisture to the air as the detrimental effect ofthe excess temperatures is increased where, the paper rolls becomeexcessively dry. A cooling medium for the ends of the rolls which addsmoisture within proper limitations is therefore more effective in itshelpfulness than mere cold air alone.

In accordance with the above construction, it will be seen that bydepositing upon the ends of the paper roll a degree of moisture suchthat the cooling effect of itspresence and its evaporation is sufficientto compensate for the protecting effect of the strip in the centerportion, no portion of the paper roll will be caused to disin'tegratebefore the rest, and since the destruction of any portion of the rollrenders; the roll as a whole useless, this means prolongation of theuseful life. Moreover, by cooling the roll as a whole the life is stillfurther prolonged.

Since certain changes in carrying out the above. process and in theconstructions set forth, which embody the invention may be made withoutdeparting from its scope, itis intended that all matter contained in theabove description or shown in the accoms panying drawing shall beinterpreted as illustrative and not in a limitingsense.

It is also to be understood that the following claims are intended tocover all of the generic and specific features of the invention hereindescribed, and all statements of the scope of the invention which, as a.

matter of language, might'be said' to fall therebetween.

Having described our invention, what we claim as new and desire tosecure by Letters Patent, is:

1. The process of converting 'paper stock which comprises passing itbetween a finishing roll and a paper roll, wetting that portion of thepaper roll not covered by the paper stock in its passage between saidrolls and subjecting the whole of the outer surface of the paper roll toartificial cooling.

2. The process of converting paper stock which comprises passing itbetween a finishing roll and a paper roll and equalizingthe temperaturebetween different portions of the paper roll by moistening the ortionsof the paper roll over which the stoc does not pass in its coursebetween the rolls. y

3. The process of converting paper stock which comprises passing itbetween a finishing roll and a paper roll, subjecting the en-,

tire surface of the paper roll to a cooling effect and subjecting aportion of the paper roll to a moistening effect.

t. The process of converting paper'stoc'k which comprises passing itbetween a finish-- ing roll and a paper roll, blowing air over thesurface of the paper roll to limit itstemperature and applying moistureto certain portions of the roll.

5. The process of converting paper stoclt which comprises passing itbetween a finishing roll and a paper roll, adding moisture to the paperroll to limit its-temperature and varying the amount of moisture appliedto. portions of the paper roll in accordance with'the width of the stockpassing between the rolls. V 6. The process of converting paper stock bymeans of a finishing roll and a paper roll, of greater length than thewidth of the stock which comprises, passing the stock between the rollsand equalizing the temperature between the rolls by subjecting the wholeof the paper roll to moist air and equalizing the temperature betweenthose portions of the paper roll protected by the stockand thoseportions exposed to the finishing roll by wetting the exposed portions.

7 The. process of converting paper stock by means of ajfiIiiShiIIgTOIland a paper roll,

stream of cool air over the surface of'the paper roll. 1

9. A device of the character described. comprising, in combination, aplurality of rolls including finishing rolls and paper rolls. means forapplying moisture to predetermined portions of the paper roll wherebyevery part of the surface of the paper roll is maintained atsubstantially the same temperature. f

-10. A device of the character described, comprising, in combination, aplurality of rolls includin finishing rolls and paper rolls, means forcoo g the paper rolls, and means for wetting ortions of the paper rolls,

11. A deviceof the character described, comprising, in combination, aplurality of rolls including finishing rolls and paper rolls,'means forlimiting the temperature of the paper rolls and means for cooling different portions of the paper rolls in varymg de ees. a

12. device of the character described,

comprising, in combination', a plurality of rolls including a finishingroll and a paper roll, means for cooling the entire surface of the"paper roll to a certain degree, and

means for cooling portions of the surface of the paper roll to adifferent degree.

' adapted for use with apa'per' stock of less width than the length ofthe rolls and means for cooling portions of the paper rolls betweenwhich thestoc k passes to a certain degree and cooling the portions ofthe paper rolls eXp'osed'to the finishing-rolls to a greater degree. I p

15. A device of the character described comprising, in combination, aplurality of .rolls including finishing rolls and paper rolls adaptedfor use with a paper stock of less width than the length of'the rollsand a third set of rolls for applying moisture to the exposed ends of-said plurality of rolls.

16. A device of the character described, comprising, in combination, aplurality of rolls including sfinishing rolls and paper rolls adaptedfor use with a paper stock of less width than the length of the rolls,means for addin moisture to the exposed end portions of t e pa er rollto equalize the tem- -perature with t e remainder ofthe roll and meansfor maintaining the temperature of the paper roll below a predeterminedlimit.

17 A device of the-character described comprising,in combination, aplurality of rolls including "finishing rolls and paper rolls adaptedfor use with a paper stock of less width than the length of the rollsand a roller journalled to contact with the end portion of the surfaceof the paper roll and means for wetting the surface ofsaid roller tocause the moistening of the end portions of said pa er roll. I

118. A evice of the character described comprising, in combination, aplurality of rolls including finishing rolls and paper rolls adapted foruse With a paper stock of less width than the length of the rolls and aroller journalled to contact with the end portion of the surface of theroll, means for moistening the surface of said roller, and means foradjusting the longitudinal positionof said roller to vary the length ofits contact with the paper roll.

19. A device of the character described for the converting of papercomprising standards, a plurality of rolls journalled in such standards,certain of said rolls being paper rolls and certain of said rolls beingsteel rolls,

' means for heating said steel rolls and adj 11st;

able means for cooling the end portions of said paper rolls.

20. A device of the character described for the converting of papercomprising standards, a plurality of rolls journalled in such standards,certain of said rolls being paper rolls and certain of said rolls beingsteel rolls, means for heating said steelrolls and adjustable means forcooling the end portions of said paper rolls, comprising a shaftsupported from said frame adjacent to each paer roll and rollersjournalled on said shaft and adjustable longitudinally thereof and meansfor moistening the surface of said rollers.

21. The method of converting paper stock which comprises passing itbetween a finishing roll and a paper roll, and cooling one part of thepaper roll to a certain degree and cooling the remainder of the paperroll to a greater degree. a

22. In apparatus of the character described a finishing .roll and apaper roll adapted to cooperate, means for passing paper stock ofcertain width between the rolls, means for cooling the paper'roll overwhich thestock passes to a certain degree,- and means for cooling theremainder of the paper roll to a greater degree whereby every part ofthe paper roll is maintained atsubstantially the same temperature. p

In testimony whereof we aflixour signatures. 1

FRANCIS W. EGAN. JOHN o. BOSS.

